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What caused the check engine light to turn on recently?

Had to change fuel pump and filter still runs really rough going down the road and doesn't idle very well

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If the check engine light is on you should be able to pull codes from it and that will give you a direction to start looking at

Posted on Apr 23, 2015

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I can start the engine, it runs for awhile, but wont keep running. i keep pumping the gas to keep it going. when going down the road, she will quit on me. when i press down on the gas, she sort of bogs...


That sounds like a fuel flow problem. I would start off changing the fuel filter and doing a pressure check on the fuel pump!

I would also suggest you test the fuel. If it has water in it, that could also cause similar symptoms. A poor mans check on fuel is to put some in a styrofoam cup and if it doesn't disolve the bottom of the cup in under 20 seconds, your fuel is contaminated.

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2002 mazda protege engine lighy o , bucking as you accelerate from 1st to 2nd gear scanner says lean fuel problem could it be a fuel filter/ pump don't know what the fuel pressure should be


It could be a number of things, but the fuel filter is where I would start looking. If the fuel filter has not been changes in the last 30,000 miles that very well could be the problem. Checking fuel pressure rarely turns up a clogged or partially clogged fuel filter unless fuel pressure is checked while driving the vehicle down the road. A restricted fuel filter will still deliver the correct fuel pressure with the key on and engine off and also at idle. The problem does not rare its ugly head until the engine is put under load. (Not really a fuel PRESSURE problem, but rather, a fuel VOLUME problem.) If the fuel filter has not been changed recently, I would replace it, clear the codes and road test the vehicle. It probably needs the filter anyway, even if it doesn't fix your problem. So it really would not be a waste of money and effort. At least you will have eliminated one possibility.

Also for fuel pressure specifictions, you need to tell us what engine your vehicle is equipped with.

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Rough idleing after pressure wash engine and fuel injector clean


Hi,
I'm assuming you added fuel injector cleaner to your fuel tank rather than using a direct pressure cleaner through your fuel injectors.
When a solvent/cleaner product is added to your fuel tank, carbonaceous deposits (basically the dirt and gunk accumulated over years) are flushed through the fuel system. This can cause major problems if the contaminants manage to enter your fuel pump and make their way past the seals. This can and has damaged good fuel pumps. Downstream of the pump is the fuel filter - once deposits reach the fuel filter, they may block it and reduce fuel flow. The next major problem areas are the injectors themselves (rather sensitive to dirty fuel) and the engine.
Fuel injector cleaner is not a product I would recommend using. Many major car manufacturer's have recently issued memos to repairers blacklisting the use of cleaner products due to the downstream damage that may potentially be caused by them.
You should replace your fuel filter once you've finished using the tank of injector cleaner. This is most likely the problem (and could have probably used a replacement anyway). I hope this solves your problem. Otherwise you should check your fuel line pressure to ensure the pump is supplying what is required. Failing this, your injectors are probably the next most likely culprit. By this stage, things are starting to get expensive so lets hope the problem is just a blocked filter!
On a related side note; pressure cleaning an engine can sometimes cause water and soap to push down beside the spark plugs in a spark ignition engine. Sometimes this will cause the engine to run a little rough until the heat of combustion burns the contaminants away.
Hope this helps, Sherwin

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TO SAVE YOU TIME AND MONEY.HAVE TRUCK SCANNED TO SEE WHAT CAUSES SERVICE LIGHT TO COME ON.YOU CAN GO TO AUTO ZONE THEY WILL SCAN IT FOR FREE.BUT IT SOUND LIKE YOUR O2 SENSORS COULD BE BAD.

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